Chimarra (Otarrha) paraodonta, Moreira & Dumas & Rozo & Desidério & Takiya, 2022

Moreira, Paula Dias, Dumas, Leandro Lourenco, Rozo, Maria Paula, Desiderio, Gleison Robson & Takiya, Daniela Maeda, 2022, Integrative taxonomy supports two new species of Chimarra Stephens, 1829 from Brazil (Trichoptera: Philopotamidae), Arthropod Systematics & amp; Phylogeny 80, pp. 169-185 : 169

3.2.2. Chimarra (Otarrha) paraodonta sp. nov.

Type locality.

Cachoeira Véu da Noiva, Parque Nacional do Itatiaia, Itatiaia, Rio de Janeiro State, Brazil.

Diagnosis.

The new species is closely similar to C. (Otarrha) odonta Blahnik, 2002 by some shared primitive characters of the subgenus, like hindwing venation pattern with Rs 4-branched and the undivided anterior head setal warts. Both species also have a simple, subtriangular, and completely divided tergum X and an inner process on each inferior appendage. However, the new species has the Otarrha synapomorphic hindwing venation with Sc+R1 fused, narrower and more uniform lobes of tergum X, and inferior appendage rhomboidal (in lateral view) and more elongated and spatulated (in ventral view). Additionally, the dorsomesal process of the inferior appendage in C. (Otarrha) paraodonta sp. nov. is thorn-like, more robust, and positioned subapically; while in C. odonta , this process is tooth-like, blunt, and positioned more apically. Furthermore, C. (Otarrha) paraodonta sp. nov. can be recognized by its differently shaped tergum IX as viewed dorsally, the more robust ventral process, and simple phallotremal sclerite.

Description.

Adult male: forewing length 5.2-5.8 mm (n=3; holotype = 5.8 mm). General color (in alcohol) uniformly golden brown, except dark brown dorsum of head. Dorsum of head with anterior, anteromesal, posterior, and posterolateral setal warts; posterolateral setal warts large; anterior setal warts each elongate and undivided; postocular parietal sclerite large, slightly extending below the eye. Maxillary palps relatively short, 2nd segment shorter than 3rd segment, apicomesally with stout setae. Wing venation typical for the subgenus (Fig. 5A-B ), except Rs of hind wing 4-branched (Fig. 5B ); forewing with forks I, II, III, and V present, stem of Rs almost straight, crossveins s, r-m and m linearly arranged and unpigmented, crossveins m-cu and cu and apex of Cu2 also hyaline; 2A not forked (Fig. 5A ); hind wing with forks I, II and V present, R1 and Sc fused; crossveins s and r-m not aligned and unpigmented, crossvein m-cu apparently absent, cu-a present, anal loop very small (Fig. 5B ). Tibial spur formula 1-4-4.

Male genitalia (Fig. 6 ): Segment IX, dorsally with anterior margin deeply concave, posterior margin almost straight (Fig. 6B ); in lateral view, with anterior margin almost straight, somewhat projected in the anteroventral portion; posterior margin sinuous, with distinct dorsomedial and ventromedial invagination (Fig. 6A ); ventral process elongate, about same length of inferior appendage as viewed laterally, enlarging apically with rounded apex (Fig. 6A , 6C ). Tergum X, in dorsal view, completely divided mesally, forming elongate, paired narrow sclerotized lobes, slightly tapering apically; apex rounded (Fig. 6B ); each lobe with numerous apical and basoventral sensilla (Fig. 6A , 6B ); in lateral view, subtriangular (Fig. 6A ). Preanal appendages flattened, earlike, laterally directed (Fig. 6A, B ). Inferior appendages, in lateral view, rhomboidal, relatively short (Fig. 6A ); each appendage with subapical thorn-like process on the dorsomesal surface (Fig. 6A, C, D ); in dorsal view, with outer lateral margin expanded distally (Fig. 6D ); in ventral view, spatulate, with truncate distal margin (Fig. 6B ). Phallic apparatus with phallotheca tubular, bearing basodorsal and basoventral pointed extensions; endotheca short, membranous, with 4 apical, robust, sclerotized spines; phallotremal sclerite simple, large, L-shaped (Fig. 6E, F ).

Etymology.

The specific epithet is a reference to the close similarity of the new species to Chimarra (Otarrha) odonta . Derived from the Greek, " para " = beside or near.

Material examined. Holotype. BRAZIL • ♂; Rio de Janeiro State, Itatiaia, Parque Nacional do Itatiaia, Complexo da Maromba, Cachoeira Véu da Noiva; 22°25 ’38.6” S, 44°37 ’9.7” W; el. 1140 m a.s.l.; 02-19.ii.2015; D.M. Takiya & A.P.M. Santos leg.; Malaise trap; DZRJ 7828 (DNA voucher ENT5579). - Paratypes. BRAZIL • 1 ♂; Rio de Janeiro State, Itatiaia, Parque Nacional do Itatiaia, Complexo da Maromba, Cachoeira Véu da Noiva [PNI-M2A]; 22°25 ’36.1” S, 44°37 ’05.80” W; el. 1153 m a.s.l; 02.x-02.xi.2015; M.L. Monné, J.P. Botero, Â.P. Pinto, L.H. Gil-Azevedo; Malaise trap, MNRJ (DNA voucher ENT5578) • 1 ♂; Rio de Janeiro State, Itatiaia, Parque Nacional do Itatiaia, abaixo da Cachoeira Véu da Noiva; 22°25 ’36.10” S, 44°37 ’05.80” W; el. 153 m a.s.l.; 02.x.2015; C.C.D. Corrêa & L.H. Gil-Azevedo leg.; INPA (DNA voucher ENT5577).

Figures

Figure 5. Chimarra (Otarrha) paraodonta sp. nov., holotype wing venation: A right forewing; B right hind wing. Abbreviations: DC, discoidal cell; MC, medial cell; TC, thyridial cell.

Figure 6. Chimarra (Otarrha) paraodonta sp. nov., holotype male genitalia: A left lateral view; B dorsal view; C ventral view; D left inferior appendage, dorsal view; E phallus, left lateral view; F phallus, ventral view.